Let f(x) = 2x + 10x Find the slope of the secant line on the graph of f (a) for each interval: [1, 3] : msec [1, 2] : msec [1, 1.5] : msec [1, 1.1] : msec = [1, 1.01] : msec - [1, 1.001] : msec = Estimate the slope of the tangent line to f(x) at x = 1 mtan = Write an equation of the tangent line to f(x) at a - 1 . [Use a and y as the variables of the equation]